Summary
International Symposium on Antennas and Propagation
2008
Session Number:4C34
Session:
Number:4C34-2
A Dual-Band Chip Antenna for Handheld Cellphones Application
Shih-Ying Sun, Sheng-Yi Huang, Jwo-Shiun Sun,
pp.-
Publication Date:2008/10/27
Online ISSN:2188-5079
Summary:
Currently, the volume of wireless terminal phones has been designed smaller than before. Antenna is one of the most important elements in a communication system. In order to reduce the effects of Electromagnetic Interference (EMI) / Electromagnetic Compatibility (EMC) and the excited current of an antenna on the system ground (GND) plane, an isolated distance between an antenna and electronic components in phones is suggested not less than 7 mm [1-2]. The most internal radiators are made by using printed techniques due to such characteristics as low-profile, low-price, and easier fabrication [3-6]. Many studies on miniaturization of antennas by using dielectric materials are already reported in [7]. Decreasing the effects of the GND plane to the performances of an antenna, the type of chip configuration antenna is presented with meander lines. The presented antenna is designed in Industrial, Scientific, and Medical (ISM) band of 2.4 GHz and Unlicensed National Information Infrastructure (U-NII) - 5 GHz. The impedance bandwidth of the designed antenna between 2.3 - 2.5 GHz and 5 - 5.5 GHz is covered referring to -10 dB Return Loss (RL). The total volume of the antenna is 10 (L) x 10 (W) x 0.2 (H) mm3 , which is greatly reduced by 70 % comparing to generally internal radiators. The ratio of impedance bandwidth of the antenna in relation to central frequencies (2.4 and 5.2 GHz) is 8.3 % and 10 %, respectively. The experimental results compared to the numerical simulator High Frequency Structure Simulator (HFSS) can be fairly good agreement. The good characteristics of the antenna such as omni-directional far-field radiation patterns can be obtained.